PublicUtility/CAAudioFileFormats.h
/* |
File: CAAudioFileFormats.h |
Abstract: Part of CoreAudio Utility Classes |
Version: 1.01 |
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*/ |
#ifndef __CAAudioFileFormats_h__ |
#define __CAAudioFileFormats_h__ |
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) |
#include <AudioToolbox/AudioToolbox.h> |
#else |
#include <AudioToolbox.h> |
#endif |
#include "CAStreamBasicDescription.h" |
class CAAudioFileFormats { |
public: |
enum { noErr = 0 }; |
struct DataFormatInfo { |
DataFormatInfo() : mVariants(NULL) { } |
~DataFormatInfo() { delete[] mVariants; } |
UInt32 mFormatID; |
int mNumVariants; |
AudioStreamBasicDescription * mVariants; |
bool mReadable; |
bool mWritable; |
bool mEitherEndianPCM; |
#if DEBUG |
void DebugPrint(); |
#endif |
}; |
struct FileFormatInfo { |
FileFormatInfo() : mFileTypeName(NULL), mExtensions(NULL), mDataFormats(NULL) { } |
~FileFormatInfo() { |
delete[] mDataFormats; |
if (mFileTypeName) |
CFRelease(mFileTypeName); |
if (mExtensions) |
CFRelease(mExtensions); |
} |
AudioFileTypeID mFileTypeID; |
CFStringRef mFileTypeName; |
CFArrayRef mExtensions; |
int mNumDataFormats; |
DataFormatInfo * mDataFormats; // NULL until loaded! |
int NumberOfExtensions() { return mExtensions ? CFArrayGetCount(mExtensions) : 0; } |
char * GetExtension(int index, char *buf, int buflen) { |
CFStringRef cfext = (CFStringRef)CFArrayGetValueAtIndex(mExtensions, index); |
CFStringGetCString(cfext, buf, buflen, kCFStringEncodingUTF8); |
return buf; |
} |
bool MatchExtension(CFStringRef testExt) { // testExt should not include "." |
CFIndex n = NumberOfExtensions(); |
for (CFIndex i = 0; i < n; ++i) { |
CFStringRef ext = (CFStringRef)CFArrayGetValueAtIndex(mExtensions, i); |
if (CFStringCompare(ext, testExt, kCFCompareCaseInsensitive) == kCFCompareEqualTo) |
return true; |
} |
return false; |
} |
bool AnyWritableFormats(); |
void LoadDataFormats(); |
#if DEBUG |
void DebugPrint(); |
#endif |
}; |
private: // use Instance() |
CAAudioFileFormats(bool loadDataFormats); |
~CAAudioFileFormats(); |
public: |
bool InferDataFormatFromFileFormat(AudioFileTypeID filetype, CAStreamBasicDescription &fmt); |
bool InferFileFormatFromFilename(const char *filename, AudioFileTypeID &filetype); |
bool InferFileFormatFromFilename(CFStringRef filename, AudioFileTypeID &filetype); |
bool InferFileFormatFromDataFormat(const CAStreamBasicDescription &fmt, AudioFileTypeID &filetype); |
bool IsKnownDataFormat(UInt32 dataFormat); |
#if DEBUG |
void DebugPrint(); |
#endif |
int mNumFileFormats; |
FileFormatInfo * mFileFormats; |
FileFormatInfo * FindFileFormat(UInt32 formatID); |
static CAAudioFileFormats * Instance(bool loadDataFormats=true); |
private: |
static CAAudioFileFormats * sInstance; |
}; |
char * OSTypeToStr(char *buf, UInt32 t); |
int StrToOSType(const char *str, UInt32 &t); |
#endif // __CAAudioFileFormats_h__ |
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